rails                  
                                          
                                          
  
                                          
  
                                          
                                          
 trains  are  so  constructed  that  they 
 have  to follow a set path. this path is 
 called  a  "railway", which is comprised 
 of two metal rails, hence its  nickname. 
                                          
 because  the low  friction  between  the 
 wheels of the train and the  rail metal, 
 there are limits for how  acute  a curve 
 can  be,  and even more  so for how much 
 the   ground  under  the  rails  can  be 
 sloped. thus a railway  is often not led 
 on top of hills, rather through them  in 
 tunnels  (if   they   are   large),   or 
            artificial chasms.            
                                          
 there will be  trees on  the side of the 
 rails,  but not  too close, or they will 
 be  cut down  by  the  railway janitors. 
 there  will  be plains,  and  bodies  of 
                  water.                  
                                          
 trains go  by day  and  by  night. along 
      the way, there is information       
 scattered, often  put  on top  of poles, 
 to be  interpreted by the train drivers. 
 different  parts  of  the  railway  have 
          different speed limits.         
                                          
 sometimes, trains have to stop and  wait 
 for something to happen, far away.  this 
 is  signaled by  red  or  green  lights. 
                                          
                                  
                                          
 many  people follow the  rails  by foot. 
 often  this  proves  to  be  the shorter 
 path between  two  points.  however this 
 is  frowned  upon,   and  very  impolite 
         toward the train drivers!